The Lost Planet (Feiwel & Friends, 2014)
This is what the boy is told:
He woke up on planet Trucon, inside a fence he shouldn't have been able to pass.
He has an annirad blaster wound to the back of his head.
He has no memory.
He is now under the protection of a mysterious benefactor.
His name is Chase Garrety.
This is what Chase Garrety knows: